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A cord is wound round the circumference of a wheel of radius r. The axis of the wheel is horizontal and the moment of inertia about it is I. A weight mg is attached to the cord at the end. The weight falls from rest. After falling through a distance h, the angular velocity of the wheel will be
  • a)
    √2gh/I+mr
  • b)
    √2mgh/I+mr2
  • c)
    √2mgh/I+Mr2
  • d)
    √2gh
Correct answer is option 'B'. Can you explain this answer?
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A cord is wound round the circumference of a wheel of radius r. The ax...
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A cord is wound round the circumference of a wheel of radius r. The axis of the wheel is horizontal and the moment of inertia about it is I. A weight mg is attached to the cord at the end. The weight falls from rest. After falling through a distance h, the angular velocity of the wheel will bea)√2gh/I+mrb)√2mgh/I+mr2c)√2mgh/I+Mr2d)√2ghCorrect answer is option 'B'. Can you explain this answer?
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